Yes, Dawn and Dusk are newer. They are made by Hivewire3D. Many of the people there were originally working for DAZ, but struck out on their own. Hivewire makes stuff that are compatible with both Poser and DAZ Studio. (They make two different versions of each.)

Dawn, Dusk, Baby Luna, and some Hivewire animals are included for free with Poser 11 and 12. Hivewire's busy working on Dawn 2 and Dusk 2, which means there's something of a pause in new products for them. A lot of people are reluctant to make or buy stuff for the original figures, when new and improved ones will be released soon-ish.